125kHz RFID Key Fobs, 10-Pack, Read Only - TK4100/EM4100, Waterproof ABS

About this item

• 【Random Mixed Colors】 – Each pack includes a mix of blue, yellow, green, red, and black. Great for color-coding users – but you cannot pick specific colors.
• 【Ready to Use – No Programming】 – Factory-set unique ID (TK4100/EM4100 chip). Works immediately – just tap within 0-4 inches (0-10cm).
• 【Durable & Waterproof ABS】 – Tough ABS material resists daily wear. Metal key ring keeps it securely attached to your keys or bag.
• 【125kHz System Compatibility】 – Works with most standard 125kHz RFID readers. Ideal for apartments, offices, parking lots, gyms, and hotels.
• 【10-Pack for Small Needs】 – Perfect for a small family or trial use. Get started without overbuying.